Use CSS Animation to Change the Hover State of a Button Glitch

My code works and I do think that everything is fine. I’ve even watched the video but the server just isn’t accepting my code. Look at it all for yourselves!

Everything is in order!

  button {
    border-radius: 5px;
    color: white;
    background-color: #0F5897;
    padding: 5px 10px 8px 10px;
  button:hover {
    animation-name: background-color;
    animation-duration: 500ms;
  @keyframes background-color {
    100% {
      background-color: #4791d0;

**Link to the challenge:**

your code passes for me, maybe try reloading the page?